616565616 has 80 divisors (see below), whose sum is σ = 1614444288. Its totient is φ = 202752000.

The previous prime is 616565611. The next prime is 616565641.

616565616 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616565611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1862571 + ... + 1862901.

Almost surely, 2^616565616 is an apocalyptic number.

It is an amenable number.

616565616 is an abundant number, since it is smaller than the sum of its proper divisors (997878672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616565616 is a wasteful number, since it uses less digits than its factorization.

616565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 744 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 616565616 is about 24830.7393365562. The cubic root of 616565616 is about 851.1245167273.

The spelling of 616565616 in words is "six hundred sixteen million, five hundred sixty-five thousand, six hundred sixteen".